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单词 Decadic dialling
释义

Decadic dialling

英语百科

Pulse dialing

The Western Electric model 500 rotary dial telephone was a pulse-dialing instrument.
British (BPO) Type 232 phone of 1932

Pulse dialling is a signaling technology in telecommunications in which a direct current local loop circuit is interrupted according to a defined coding system for each signal transmitted, usually a digit. This lends the method the often used name loop disconnect dialing. In the most common variant of pulse dialing, decadic dialing, each of the ten arabic numerals are encoded in a sequence of up to ten pulses. The most common version decodes the digits 1 through 9, as one to nine pulses, respectively, and the digit 0 as ten pulses. Historically, the most common device to produce such pulse trains is the rotary dial of the telephone, lending the technology another name, rotary dialing.

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更新时间:2025/6/16 20:02:32